<template>
  <div class="container">
    <div class="app-container">
      <el-tree default-expand-all :data="depts" :expand-on-click-node="false" :props="defaultProps">
        <template v-slot="{ data }">
          <el-row style="width:100%;height:40px" type="flex" justify="space-between" align="middle">
            <el-col>{{ data.name }}</el-col>
            <el-col :span="4">
              <span class="tree-manager">{{ data.managerName.substring(0, 3) }}</span>
              <!-- $event 实参 表示类型 -->
              <el-dropdown @command="operateDept($event, data.id)">
                <!-- 显示区域内容 -->
                <span class="el-dropdown-link">
                  操作<i class="el-icon-arrow-down el-icon--right" />
                </span>
                <!-- 下拉菜单选项 -->
                <el-dropdown-menu slot="dropdown">
                  <el-dropdown-item command="add">添加子部门</el-dropdown-item>
                  <el-dropdown-item command="edit">编辑部门</el-dropdown-item>
                  <el-dropdown-item command="del">删除</el-dropdown-item>
                </el-dropdown-menu>
              </el-dropdown>
            </el-col>
          </el-row>
        </template>
      </el-tree>
    </div>
    <add-dept ref="addDept" :current-node-id="currentNodeId" :show-dialog.sync="showDialog"
      @updateDepartment="getDepartment" />
  </div>
</template>
<script>
import { getDepartment, delDepartment } from '@/api/department'
// transListToTreeData
import { transListToTreeData } from '@/utils'
import AddDept from './components/add-dept'
export default {
  name: 'Department',
  components: { AddDept },
  data() {
    return {
      currentNodeId: 0,
      depts: [],
      showDialog: false,
      defaultProps: {
        children: 'children',
        label: 'name'

      }
    }
  },
  methods: {
    async getDepartment() {
      this.depts = transListToTreeData(await getDepartment(), 0)
    },
    operateDept(type, id) {
      if (type === 'add') {
        this.showDialog = true
        this.currentNodeId = id
      } else if (type === 'edit') {
        this.showDialog = true
        this.currentNodeId = id
        //props传值是异步的
        this.$nextTick(() => {
          //这里为什么要用$nextTick，因为弹出层之后紧接着要调用子组件方法，第一次弹出层时，里面的组件还未完成渲染，
          // 所以要等到showDialog这个属性设置的数据完成渲染之后才进行调用
          // this.$refs.addDept 相当于子组件的this
          this.$refs.addDept.departmentDetail()
        })
      } else if (type === 'del') {
        this.$confirm('你确定要删除此部门吗？').then(async () => {
          await delDepartment(id)
          this.$message.success('删除部门成功！')
          await this.getDepartment()
        })

      }
    }
  },
  created() {
    this.getDepartment()
  }
}
</script>
<style scoped>
.app-container {
  padding: 30px 140px;
  font-size: 14px;
}

.tree-manager {
  width: 50px;
  display: inline-block;
  margin: 10px;
}
</style>
